Knob attachment



(No Mode1.)

' D. CLARK.

KNOB ATTACHMENT.

No. 506,388; l Patented ont. 15o, 189s.` i

Www/11M l @v4/Imaam UNITED Sterns PATENT Ormes.

DEXTER CLARK, OF MILFORD, MICHIGAN.

KNOB ATTACHMENT.

SPECIFICATION forming part of Letters Patent No. 506,388, dated October10, 1893.

Application filed March 18, 1893. Serial No. 466,637. (No model.)

To all whom it may concern:

Beit known that l, DEXTER CLARK, -a citizen of the UnitedStates,residing at Milford, county of Oakland, State of Michigan, have inventeda certain new and useful Improvement in Door-Knob Attachments; and ldeclare the following to bea full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, which form a part of this specification.

My invention relates to certain new and useful improvements in a spindleand a door knob attachment thereto, as hereinafter -specitied andclaimed, and illustrated in the drawings, in which- Figure lis a view inelevation. Fig. 2 is a view in longitudinal section embodyingmyinvention. Fig. 3 is aseparate view of the spindle body andspindlearms forming the completed spindle.

The object of my invention is to provide a spindle and knob attachmentthereto whereby the knob will be firmly held in place, without liabilityof slipping off, and whereby alsov it will be readily adjusted intoposition upon the spindle and against the ordinary rose, in

a superior and most efficient manner.

I carry out my invention as follows:

A represents the door in which the spindle is engaged.

My improved spindle is constructed with a body portion B, theintermediate part of which is made solid and of rectangular form, squarein cross section, as indicated at B2. One or both extremities of thespindle are cut away to form a wedge shaped face, as shown at b formingcorresponding recesses, extending longitudinally at the extremities ofthe spindle. These cutaway ends are extended into the adjacent shank Dof the knob D, and are shown at B. Into said longitudinal recessesformed by cutting away the ends of the spindle I locate correspondinglyshaped spindle arms h, having a wedge shaped face adjacent to the wedgeshaped face of the parts B of the spindle, the wedge shaped face'of theone being the counterpart of the other, the arms h wedging against thepart B as said arms are drawn outward, and' vice versa. This isaccomplished by making the respective recesses deepest at their innerends and the arms b thinnest at `their outer ends.

Thearms h are each provided with a flanged 5 5 Ihead b3 at the outer endextending over the end of the arms B and having a screw threaded orificetherein to receive a screw C, by which the knob is engaged thereupon.The

spindle. thus, as a completed article is con- 6o structed in threeparts, the body B with its cut away ends B and 'the two wedge shapedarms ZJ, h fitted into the cutaway portions of the spindle, andextending over the outer ends of the body portion. screws C areinserted, only a very slight movement of the arms b is requiredto'tighten thespindle asawholeintheshank. Theshank is thus drawn downfirmly against the adjal cent rose, and is held from any possibility of7o constructed knob not being required. In this 8o manner parallel innerfaces within the shank bear against similar faces upon the ends of thebody portion of the spindle, and arms screws are driven home, the arms bmoving in or`ou't as may be required to eect the desired adjustment ofthe parts, the Shanks engaging over both the adjacent extremity of thebody of the spindle and the outer end of 9o the adjacent movable arm b.

What I claim as my invention isl. A door knob spindle constructed inthree parts consisting of a body portion B cutaway or recessedlongitudinally at its extremities, 95

and of movable spindle arms h, b located in the out away portions ofsaid extremities respectively and formed with heads extending over theend faces of the body of the spindle, and in combination therewith knobsIoo and their shanks embracing the adjacent ends of the spindle body andspindle arms respectively, and screws C engaging the knobs with theheads of the spindle arms, said When the The inner faces ot' the shank75 The Shanks of the knobs readily adjust themselves to proper positionas the Shanks being straight faced interiorly adjacent to the spindlebody and arm, the adjacent faces of the spindle body and spindle armsbeing Wedge shaped to prevent the Shanks from being pulled offtherefroin,sub stantially as described.

2. A door knob spindle constructed in three parts consisting of a bodyportion B, square in cross section intermediate its ends and cut away orrecessed longitudinally at its extremities, and of movable spindle armsb, 19 located in the cut away portions of said eX- tremtiesrespectively, normally forming with the ends of said body a square incross section, and provided with heads extending over the end faces ofthe body of the spindle, and in combination therewith knobs and theirshanks embracing the adjacent ends of the spindle body and spindle armsrespectively, and screws C engaging the knobs with the heads of thespindle arms, said Shanks being straight faced interiorly adjacent tothe spindle body and arm, the adjacent faces of the spindle body andspindle arms being Wedge shaped to prevent the shanks from being pulledoff therefrom, the opposite exterior faces of said body portion andspindle arms being on parallel planes, substantially as described.

In testimony whereof I sign this specification in the presence of twoWitnesses.

DEXTER CLARK.

